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Highly efficient slurryless finishing of difficult-to-polish materials by active controlled electrochemical mechanical polishing

Research Project

Project/Area Number 18K18810
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 18:Mechanics of materials, production engineering, design engineering, and related fields
Research InstitutionOsaka University

Principal Investigator

Yamamura Kazuya  大阪大学, 工学研究科, 教授 (60240074)

Project Period (FY) 2018-06-29 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Keywords電気化学機械研磨 / スラリーレス / 難加工材料 / SiC / シリコンカーバイド / GaN
Outline of Final Research Achievements

In this study, slurryless ECMP was proposed, developed and applied to 4H-SiC wafers. The anodic oxidation properties and mechanism of 4H-SiC (0001) surface and the polishing mechanism of slurryless ECMP were investigated and clarified. When applying slurryless ECMP to sliced 4H-SiC (0001) surfaces, MRRs of 10 - 23 μm/h were obtained, and damage-free surfaces with Sq surface roughness less than 1 nm was obtained. We also succeeded in obtaining a surface roughness of 0.2 nm Sq with high efficiency by applying a two-step slurryless ECMP consisting of rough ECMP and finish ECMP.

Academic Significance and Societal Importance of the Research Achievements

本研究では、酸化により形成した軟質膜を母材よりも軟質な砥粒によって積極的に除去することで形状創成や表面仕上げをおこなうという、通常の陽極酸化の目的とは逆転する発想に基づいた新しい加工法を開発し、その有用性を実証したことに工学的な意義がある。
また、提案する加工法は、従来のCMP装置と比較して装置構成が極めて単純であり、装置コストの大幅な低減が期待できる一方、現状の研磨プロセスでは使用することが常識となっているスラリーを全く使用しないという革新的なプロセスであり、低環境負荷と研磨プロセスの低コスト化を実現する新しい加工法として従来プロセスを凌駕する点において社会的な意義がある。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (17 results)

All 2020 2019 2018

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (12 results) (of which Int'l Joint Research: 6 results)

  • [Journal Article] Obtaining Atomically Smooth 4H-SiC (0001) Surface by Controlling Balance Between Anodizing and Polishing in Electrochemical Mechanical Polishing2019

    • Author(s)
      Xu. Yang, X. Yang, R. Sun, K. Kawai, K. Arima, K. Yamamura
    • Journal Title

      Nanomanufacturing and Metrology

      Volume: 2 Issue: 3 Pages: 140-147

    • DOI

      10.1007/s41871-019-00043-5

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Highly efficient planarization of sliced 4H-SiC (0001) wafer by slurryless electrochemical mechanical polishing2019

    • Author(s)
      Xu. Yang, X. Yang, K. Kawai, K. Arima, K. Yamamura
    • Journal Title

      International Journal of Machine Tools and Manufacture

      Volume: 144 Pages: 103431-103431

    • DOI

      10.1016/j.ijmachtools.2019.103431

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ultrasonic-assisted anodic oxidation of 4H-SiC (0001) surface2019

    • Author(s)
      X. Yang, X. Yang, K. Kawai, K. Arima, K. Yamamura
    • Journal Title

      Electrochemistry Communications

      Volume: 100 Pages: 1-5

    • DOI

      10.1016/j.elecom.2019.01.012

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Surface Modification and Microstructuring of 4H-SiC(0001) by Anodic Oxidation with Sodium Chloride Aqueous Solution2019

    • Author(s)
      X. Yang, R. Sun, K. Kawai, K. Arima, K. Yamamura
    • Journal Title

      Applied Materials & Interfaces

      Volume: 11 Issue: 2 Pages: 2535-2542

    • DOI

      10.1021/acsami.8b19557

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Investigation of anodic oxidation mechanism of 4H-SiC (0001) for electrochemical mechanical polishing2018

    • Author(s)
      X. Yang, R. Sun, Y. Ohkubo, K. Kawai, K. Arima, K. Endo, K. Yamamura
    • Journal Title

      Electrochimica Acta

      Volume: 271 Pages: 666-676

    • DOI

      10.1016/j.electacta.2018.03.184

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 電気化学機械研磨による SiC の高能率スラリーレス加工法の開発(第4報) -4H-SiC(0001)スライス面のスラリーレス電気化学機械研磨-2020

    • Author(s)
      楊旭、楊暁喆、川合健太郎、有馬健太、山村和也
    • Organizer
      2020年度精密工学会春季大会学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 電気化学機械研磨による SiC の高能率スラリーレス加工法の開発(第5報) -表面粗さを低減させる電位条件の基礎検討-2020

    • Author(s)
      楊旭、楊暁喆、川合健太郎、有馬健太、山村和也
    • Organizer
      2020年度精密工学会春季大会学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Comparison of two-step and simultaneous slurryless electrochemical mechanical polishing for obtaining smooth 4H-SiC (0001) surface2019

    • Author(s)
      Xu. Yang, X. Yang, K. Kawai, K. Arima, K. Yamamura
    • Organizer
      The 15th China-Japan International Conference on Ultra-Precision Machining Process (CJUMP2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Slurryless electrochemical mechanical polishing of 4H-SiC (0001) surfaces2019

    • Author(s)
      Xu. Yang, X. Yang, K. Kawai, K. Arima, K. Yamamura
    • Organizer
      International Conference on Silicon Carbide and Related Materials (ICSCRM2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Preliminary study on slurryless electrochemical mechanical polishing of sliced 4H-SiC (0001) surface2019

    • Author(s)
      Xu Yang, X. Yang, K. Kawai, K. Arima, K. Yamamura
    • Organizer
      The 8th International Conference of Asian Society for Precision Engineering and Nanotechnology (ASPEN2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Optimization of polishing parameters for obtaining smooth 4H-SiC (0001) surface by slurryless electrochemical mechanical polishing2019

    • Author(s)
      Xu Yang, X. Yang, K. Kawai, K. Arima, K. Yamamura
    • Organizer
      The 22nd International Symposium on Advances in Abrasive Technology (ISAAT2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of high-efficient and damage-free ultrasonic assisted electrochemical mechanical polishing for difficult-to-machine materials -Effects of mass concentration of electrolyte (NaCl) on the anode oxidation rate and the promotion performance of ultrasonic vibration-2019

    • Author(s)
      X. Yang, X. Yang, K. Kawqai, K. Arima, K. Yamamura
    • Organizer
      2019年度精密工学会春季大会学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 電気化学機械研磨による SiC の高能率スラリーレス加工法の開発(第 3 報) -酸化レートと研磨レートとのバランスが表面粗さに与える影響の調査-2019

    • Author(s)
      楊旭,楊暁喆,川合健太郎,有馬健太,山村和也
    • Organizer
      2019年度精密工学会春季大会学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] AFM observation of initial oxidation stage of 4H-SiC (0001) in electrochemical mechanical polishing2018

    • Author(s)
      X. Yang, Y. Ohkubo, K. Endo, K. Yamamura
    • Organizer
      The 19th CIRP Conference on Electro Physical and Chemical Machining
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Preliminary study on the electrochemical mechanical polishing of 4H-SiC (0001) surface2018

    • Author(s)
      X. Yang, K. Kawai, K. Arima, K. Yamamura
    • Organizer
      The 14th China-Japan International Conference on Ultra-Precision Machining Process
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 固定砥粒を用いた4H-SiC (0001)表面の電気化学機械研磨2018

    • Author(s)
      楊旭, 川合健太郎, 有馬健太, 山村和也
    • Organizer
      精密工学会2018年度関西地方定期学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 電気化学機械研磨によるSiCの高能率ダメージフリー加工法の開発(第2報)-酸化レートの変化による表面粗さの改善-2018

    • Author(s)
      楊旭, 川合健太郎, 有馬健太, 山村和也
    • Organizer
      2018年度精密工学会秋季大会学術講演会
    • Related Report
      2018 Research-status Report

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Published: 2018-07-25   Modified: 2021-02-19  

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